Rotfeder

Rotfeder is the digital correction board for teachers. Photograph or scan a student's worksheet, tap a wrong word – and type the right form above it. Rotfeder finds exactly that handwriting in the photo, strikes it through in clean red and writes your correction on top. HOW IT WORKS • Pick a photo, scan a sheet or share one from another app • Tap a wrong word, or slide your finger along a sentence • Type the correct form – done • Share as a PDF (A4) or image with the student or parents CORRECT LIKE WITH A RED PEN • A clean red strike-through that follows the line of writing • Corrections stay sharp however far you zoom in • Strike only, free text, pen and circles – a drawn circle is smoothed automatically • Signature and stamp with date, any colour for pen and text • Undo anything, move and edit corrections • View the original: show and hide corrections with one tap CLASSES, SESSIONS AND KIDS • Create classes with an icon and colour and add kids – by first name or nickname, each with an animal avatar • Keep sessions per class and record who was there with one tap • Assign each sheet to a kid, a session or just the class • Student report: attendance, homework and grading status per kid – share it as an A4 PDF • See at a glance what is open, in progress and done YOUR DATA STAYS WITH YOU • No AI, no cloud: recognition uses classic image processing right on the device • Works completely offline – no account, no ads, no tracking • Save a backup file and restore it, with reminders • Trash: restore deleted items for 7 days • Optional: sync through your own iCloud (off by default) Rotfeder runs on iPhone and iPad and speaks 29 languages. Example data is included to try it out.